Question

我正在尝试创建一个listview，每行包含checkbox和edittext。我已使用edittext在checkbox已检查事件中启用notifyDatasetChanged()。

但是它会重置位置，这使得难以跟踪当前位置。我已经创建了一个实例变量来跟踪checkbox已检查事件的当前位置，但是它也会重置到最后检查的项目。

checkbox工作正常。它在选中时启用edittext并在取消选中时禁用，也检查状态是否正常。但问题是，edittext如果我使用listposition，则只会获得上次检查的值;如果我使用last item则会position。

我的适配器如下：

public class ListViewAdapter extends ArrayAdapter<Model> implements TextWatcher{

private final List<Model> list;
private final Context context;
private int listPosition;
private ViewHolder newHolder = null;

public ListViewAdapter(Context context, List<Model> list) {
    super(context, R.layout.row, list);
    this.context = context;
    this.list = list;
}

public static class ViewHolder {
    public CheckBox mCheckBox;
    public EditText mEditText;
}

@Override
public View getView(final int position, View convertView, final ViewGroup parent) {

    if (convertView == null) {
        LayoutInflater inflator = LayoutInflater.from(context);
        convertView = inflator.inflate(R.layout.row, null);
        newHolder = new ViewHolder();
        newHolder.mCheckBox = (CheckBox) convertView.findViewById(R.id.checkbox);
        newHolder.mEditText = (EditText) convertView.findViewById(R.id.txtValue);
        newHolder.mCheckBox.setText(list.get(position).getCheckText());
        newHolder.mEditText.setText(list.get(position).getValue());
        setEdit(false);

        convertView.setTag(newHolder);
        convertView.setTag(R.id.checkbox, newHolder.mCheckBox);
        convertView.setTag(R.id.txtValue, newHolder.mEditText);
    } else {
        newHolder = (ViewHolder) convertView.getTag();
    }

    newHolder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            int getPosition = (int) compoundButton.getTag();
            list.get(getPosition).setSelected(compoundButton.isChecked());
            list.get(getPosition).setEnabled(compoundButton.isChecked());
            setEdit(compoundButton.isChecked());
            listPosition = getPosition;
            if(!compoundButton.isChecked()){
                list.get(getPosition).setValue("");
            }
            notifyDataSetChanged();
        }
    });

    newHolder.mCheckBox.setTag(position); 
    newHolder.mEditText.setTag(position);
    newHolder.mEditText.addTextChangedListener(this);
    setEdit(list.get(position).isEnabled());
    return convertView;
}

public void setEdit(boolean bool){
    newHolder.mEditText.setEnabled(bool);
    newHolder.mEditText.setFocusableInTouchMode(bool);
    newHolder.mEditText.setCursorVisible(bool);
}

@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}

@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {}

@Override
public void afterTextChanged(Editable s) {
    list.get(listPosition).setValue(s.toString());
}

}

Answer 1

您应该使用arraylist来存储已检查的位置，而不是存储到单个整数中。在adpater中定义temp arraylist并创建Hashmap以存储在特定edittext上输入的值

@Override
public View getView(final int position, View convertView, final ViewGroup parent) {

    if (convertView == null) {
        LayoutInflater inflator = LayoutInflater.from(context);
        convertView = inflator.inflate(R.layout.row, null);
        newHolder = new ViewHolder();
        newHolder.mCheckBox = (CheckBox) convertView.findViewById(R.id.checkbox);
        newHolder.mEditText = (EditText) convertView.findViewById(R.id.txtValue);
        newHolder.mCheckBox.setText(list.get(position).getCheckText());
        newHolder.mEditText.setText(list.get(position).getValue());
        setEdit(false);

        convertView.setTag(newHolder);
        convertView.setTag(R.id.checkbox, newHolder.mCheckBox);
        convertView.setTag(R.id.txtValue, newHolder.mEditText);
    } else {
        newHolder = (ViewHolder) convertView.getTag();
    }


    newHolder.mCheckBox.setTag(position); 
    newHolder.mEditText.setTag(position);
    //newHolder.mEditText.addTextChangedListener(this); Remove this
    setEdit(list.get(position).isEnabled());

    //Added Change here...Check if arraylist contains selectedposition or not?

    if(selectedPosition.contains(String.valueOf(position))){
           list.get(getPosition).setSelected(compoundButton.isChecked());
            list.get(getPosition).setEnabled(compoundButton.isChecked());
            setEdit(compoundButton.isChecked());
    }else{
           setEdit(false);
           list.get(getPosition).setValue("");
    }

   //Same way compare for edittext

   if(editHash.containsKey(Integer.parseInt(position))){
       newHolder.mEditText.setText(editHash.get(position));
    }else{
       newHolder.mEditText.setText("");
    }

    newHolder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

        int position = (int) compoundButton.getTag();
        //Simply store and check selectedPosition

       if(!b)
           selectedPosition.remove(String.valueOf(position));
       else
           selectedPosition.add(String.valueOf(position));

       //And then update adapter
       notifyDataSetChanged();

        }
    });

   //Let's add Textwatcher for our Edittext
   newHolder.mEditText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {

             int position = (int) newHolder.mEditText.getTag();
             //Storing into Hashmap
             editHash.put(position, s.toString());

        }
    });


    return convertView;
}

现在按照以下内容更新你的getView（）方法：

We = inv.log_10[(log_10(W_to) - A)/B]

有没有办法在Listview中启用带Checkbox的Edittext？

1 个答案: